Fix ConcurrentModificationException related to ping task on Folia

Affects issues:
- Fixed #3844

Plan/bukkit/src/main/java/com/djrapitops/plan/gathering/timed/BukkitPingCounter.java

@@ -87,7 +87,7 @@ public BukkitPingCounter(
         this.dbSystem = dbSystem;
         this.serverInfo = serverInfo;
         startRecording = new ConcurrentHashMap<>();
-        playerHistory = new HashMap<>();
+        playerHistory = new ConcurrentHashMap<>();
 
         Optional<PingMethod> loaded = loadPingMethod();
         if (loaded.isPresent()) {